He's Not Right, He'll Never Be Right....
The sudden anger in Eric's voice suddenly changed the dynamic - Shawn was no longer trying to persuade the older boy, he was trying to avoid his ire. Eric was a threat; something to appease, avoid, or trick somehow, not a fellow traveller. "I've gotta go..." He had dropped off his flowers, and since Eric had arrived he had a ready-made excuse for why he was leaving early ('Eric was a closer friend, I didn't want to disturb them').